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Assume that an article in a weekend newspaper implies that more than half of all Sydney residents would prefer tolls on all motorways to be reduced by 25 cents, rather than receiving a $100 lower annual registration cost for their cars. Also assume that this was based on a poll where 562 of 1,040 participants indicated that they would rather have the reduced motorway tolls (You need to show all your calculations and demonstrate how you obtain your results).
(a) Is there evidence based on the survey data that more than half of all Sydney residents would rather have motorway tolls reduced by 25 cents than have their annual car registration lowered by $100. You should justify your answer with a hypothesis test at the 5% significance level.
(b) Calculate the p-value of your hypothesis test in Part (a) and interpret its value.
Compare the means of two populations using 96% confidence interval:
A voltmeter is used to measure a known voltage of 100 V. Forty percent of the readings are within 0.5 V of the true value. Estimate the standard deviation for the meter.
(a) What is the sampling distribution of the mean? You should give a brief explanation of your answer.
The proportion of defective items generated by a manufacturing process is believed to be 8%. In constructing a p-chart for the process, determine how large the sample size should be to avoid ending up with a negative lower control limit.
Normalized matrix for one decision criterion at Firm T is given below.
question the probability that house sales will increase in the next 6 months is estimated to be 0.25. the probability
What is the probability that a randomly selected package of this cheese will actually contain at least 20.5 ounces?
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
H01: There will be no significant differences in high school teacher efficacy among mathematics, science, and English teachers.
Given all of this information, estimate how likely it is that poll 1 and poll 2 will predict the opposite (Republicans win in stead of Democrats, meaning that Republicans should have at least 51% of the votes in the sample).
The test statistics for a small-sample test concerning proportion is the ___________. [hint: use all lowercase letters]
Suppose you want to test the claim the the paired sample data given below come from a population for which the mean difference is ud=0. The mean value of the differences for the paired sample data.
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